Comfort Systems USA
Comfort Systems USA, Inc. (NYSE: FIX) provides mechanical and electrical contracting services to commercial, industrial and institutional customers, including building owners, developers, property managers and general contractors. It designs, builds, installs, maintains, repairs and replaces heating, ventilation and… From the company’s description.
In fiscal 2025, Comfort Systems USA reported revenue of $9.10B, up 29.5% from fiscal 2024, and net income of $1.02B. Its operating margin was 14.4%, and operations generated $1.19B in cash. Over the twelve months to Sep 30, 2026, revenue was $12.54B.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Comfort Systems USA does
In the company’s own words
Comfort Systems USA, Inc. (NYSE: FIX) provides mechanical and electrical contracting services to commercial, industrial and institutional customers, including building owners, developers, property managers and general contractors. It designs, builds, installs, maintains, repairs and replaces heating, ventilation and air-conditioning, plumbing, piping, controls and electrical systems, and also provides off-site construction, monitoring and fire protection. The company operates through mechanical and electrical service activities, which accounted for 73.3% and 26.7% of 2025 revenue, respectively. Its work spans new construction as well as renovation, expansion, maintenance, repair and replacement; 63.2% of 2025 revenue came from installation in newly constructed facilities. Customers operate in sectors including technology, manufacturing, healthcare, education, government, offices and retail. Comfort Systems has 50 operating units and 190 locations across 142 U.S. cities. At December 31, 2025, it had approximately 22,700 employees and 8,427 projects in process with an aggregate contract value of approximately $24.17 billion. The company was established in 1997. Its website is www.comfortsystemsusa.com.
Company details
- Sector
- Industrials
- Industry (SIC)
- Construction
- Headquarters
- HOUSTON, TX
- Fiscal year end
- December
- CIK
- 1035983
- SIC
- 1731
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Comfort Systems USA — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Superinvestors in Comfort Systems USA · what they did last quarter
Share of each manager’s reported 13F portfolio. Change is in shares held, since the previous quarter.
Largest fund holders · Comfort Systems USA’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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